JB/T 9023.1-2019Down-the-hole drill rigs - Part 1: Open-pit mining type (English PDF)

3.1 Types

Drills are divided into electric motor driven drill or internal combustion engine driven drill according to the driving mode. They use crawler tracks or tires to travel and rotary impact drilling. Their basic structural type is shown in Figure 1. force during movement.

4.2 Basic requirements

4.2.9 The design of the electrical system shall comply with the provisions of GB/T 5226.1.

4.2.10 The electrical system shall be equipped with an overload protection device to ensure safety.

4.2.11 The electrical system shall be free of poor contact, failure and leakage.

4.2.12 All parts where the external power supply is introduced into the cable device and the parts of the fuselage where the cable passes through shall be equipped with transition arcs to prevent cutting and wear. The cable shall be firmly fixed; the clip shall not be loose; and a leakage protection device shall be installed.

4.2.13 The design, manufacture, installation and piping of the hydraulic system shall comply with the provisions of GB/T 3766.

4.2.14 Hydraulic components shall comply with the provisions of GB/T 7935.

4.2.15 The hydraulic system shall be free of oil leakage and be equipped with protective devices to prevent dust and other impurities from entering.

4.2.16 The drill shall have a flexible, accurate and reliable device for connecting and disconnecting the drill rod; and the thread type of the drill rod joint shall be indicated in the relevant documents.

4.2.17 The drill shall be equipped with a rigid hook for towing; and the size of the traction force shall be indicated in the relevant documents.

4.2.18 The manufacturing accuracy of the gear of the drill reducer shall be no lower than Grade- 8 specified in GB/T 10095.1-2008 and GB/T 10095.2-2008.

4.2.19 When the drill is operating, the maximum oil temperature of the reducer shall not exceed 80°C, and the temperature rise shall not exceed 30°C.

4.2.20 The air-way and water-way systems shall be installed correctly, well sealed, and free of air and water leakage.

4.2.21 The assembly requirements of the drill shall comply with the provisions of JB/T 7165.

4.2.22 The welding quality of the drill shall comply with the provisions of JB/T 5943.

4.2.23 The coating quality of the drill shall comply with the provisions of JB/T 5946.

4.2.24 The dust removal equipment of the drill shall be complete; and the dust removal effect shall meet the environmental protection requirements.

4.2.25 The matching downhole impactor and downhole drill bit shall comply with the provisions of GB/T 13344.

4.2.26 The matching rock drilling tools shall comply with the provisions of relevant national standards and relevant industry standards.

4.2.27 Drill with special requirements can be manufactured and inspected according to the technical agreement between the user and the manufacturer.

4.3 Safety requirements

4.3.1 The operating parts of the driver's cab, the parts for loading and unloading drill rods and other parts that are often touched by the human body must not have sharp edges and corners, and burrs must be removed.

4.3.2 The dust concentration (PM10) in the driver's cab shall not exceed 2 mg/m³.

4.3.3 The dust concentration (PM10) at the exhaust port of the drill dust removal system shall not exceed 100 mg/m³.

4.3.4 The noise in the driver's cab shall not exceed 85 dB (A).

4.3.5 The total vibration frequency in the driver's cab shall be less than 250 Hz, the local vibration frequency is (16~250) Hz, and the vibration acceleration is 2g.

4.3.6 The illuminance in the driver's cab shall be no less than 100 lx.

4.3.7 The glass in the driver's cab and the machine room shall be vibration-resistant and shall not injure the operator after breaking.

4.3.8 All paint, decoration, film and other materials in the driver's cab shall take the flame-retardant materials that do not emit highly toxic gases when burned.

4.3.9 All rotating or reciprocating parts that pose a safety risk to operators, except for drill rods, propulsion mechanisms and travel mechanisms, shall be equipped with protective devices. All dangerous areas or parts such as transmission, high temperature, circuits, and fragile parts that operators may touch shall be isolated with protective devices (such as protective covers, protective plates, etc.). The design of product protective devices shall comply with the requirements of GB/T 8196.

4.3.10 All lighting facilities shall be equipped with appropriate protective devices (such as protective covers and protective nets) and be able to avoid mechanical damage. The waterproof level shall comply with the provisions of IP55 in GB/T 4208-2017.

4.4 Reliability and life requirements

The operating time of the drill from the date of use to the first overhaul shall comply with the provisions of Table 2.

5.1 Preparation before the test

5.1.3 Measurement accuracy

The measurement accuracy shall comply with the provisions of GB/T 21153.

5.2 Test requirements

The prototype shall be tested according to the following requirements.

a) During the test, all operations and maintenance shall be carried out strictly in accordance with the provisions of the instruction manual;

b) If a fault occurs during the test, the test shall be stopped immediately;

c) The instruments and meters used for measurement shall have a valid calibration certificate and meet the measurement accuracy requirements. The instruments shall be checked and calibrated before the test;

d) The change in ambient temperature during the temperature rise test shall not exceed 5°C.

5.3 Test items

5.3.1 Determination of main dimensions

Use steel ruler and steel tape to measure the external dimensions and main structural dimensions in the transporting state.

5.3.2 Travelling test

The test shall be carried out on a flat, dry, and well-adhesive dirt road. The travelling length shall be no less than 20 m. Use tape and stopwatch to measure the normal travelling speed of the drill.

5.3.3 Climbing test

The test shall be carried out on a flat, solid earth slope or gravel clay slope. The drill shall travel up and down for a distance of (15~20) m. The climbing capability shall meet the requirements of Table 1.

5.3.4 Axis pressure test

Make the drill rig perpendicular to the horizontal plane. Use an electronic dynamometer to measure the axis pressure data without installing the drill rod and downhole impactor. The results shall meet the design requirements of the drill.

5.3.5 Braking test

On the specified slope, brake and measure the braking distance when driving up and down the slope. The results shall meet the requirements of 4.2.3.

5.3.6 Sealing test

5.3.6.1 Perform a water pressure test on the air-way system with a pressure of 1.25 times the working pressure; and maintain the pressure for 20 min. The result shall meet the requirements of 4.2.20.

5.3.6.2 Boost the pressure of the hydraulic system to 1.5 times the rated pressure (when the rated pressure is less than or equal to 16 MPa) or 1.25 times the rated pressure (when the rated pressure is greater than 16 MPa); and maintain the pressure for 2 min. The result shall meet the requirements of 4.2.15.

5.3.7 Reducer test

After the reducer runs for 2 h, use a spot thermometer to measure the temperature rise of the bearing housing. The result shall meet the requirements of 4.2.19.

5.3.8 Driver's cab test

5.3.8.1 The dust concentration in the driver's cab is measured in accordance with the provisions of HJ 618-2011. The result shall meet the requirements of 4.3.2 of this Part.

5.3.8.2 The noise in the driver's cab shall be tested in accordance with the provisions of GB/T 13325; and the results shall comply with the provisions of 4.3.4 of this Part.

5.3.8.3 The vibration value in the driver's cab shall be tested with a vibration meter; and the results shall comply with the provisions of 4.3.5.

5.3.8.4 The illuminance in the driver's cab shall be tested with an illuminance meter; and the results shall comply with the provisions of 4.3.6.

5.3.9 Dust concentration at the exhaust outlet of the dust removal system

When the whole machine is working normally, use the FC-A dust sampler to measure at 1m away from the exhaust outlet; and the results shall comply with the provisions of 4.3.3.

6.1 Exit-factory inspection

6.1.1 Each drill shall be subject to exit-factory inspection and shall not leave the factory until it has passed the inspection of the quality inspection department and is accompanied by a product certificate.

6.1.2 Exit-factory inspection shall be conducted by the quality inspection department of the manufacturer in accordance with the provisions of Table 3.

7.1 Marking

7.1.1 The product label shall be fixed in a conspicuous position on the body of the drill and shall comply with the provisions of GB/T 13306.

7.1.2 The product label shall include at least the following.

a) Manufacturer name and address;

b) Product name and model;

c) Main technical parameters;

d) Implementation standard number;

e) Exit-factory number; f) Exit-factory date.

7.1.3 The drill shall be provided with operating signs and lubrication diagrams at corresponding or obvious locations.

7.2 Packaging

7.2.1 The drill shall be packaged bare, and the parts that need protection shall be wrapped.

7.2.2 The packaging of random tools, spare parts and random documents shall be rainproof and moisture-proof.

7.2.3 When the drill leaves the factory, the following random documents shall be provided.

a) Product certificate;

b) Instruction manual;

c) Packing list;

d) Parts manual;

e) Instruction manual of main accessories.

7.3 Transporting

7.3.1 The packaging of the drill shall comply with the provisions of GB/T 13384.

7.3.2 When transporting the drill, it shall comply with the relevant provisions of the railway, […]