NB/T 11257-2023Safety conditions assessment of water hazards prevention and control of mining and tunnelling working face in underground coal mine (English PDF)

3.1 Safety conditions assessment of water prevention and control for mining face

Before mining activities, by analyzing and evaluating the hydrogeological conditions, water filling conditions and water prevention and control measures taken at the mining face.

It is a process of judging whether the safety conditions are met item by item, and finally comprehensively judging whether the mining working face meets the safety conditions.

4.1 Evaluation objectives

By evaluating the implementation of various elements and measures to prevent and control water in the mining working face, we can determine whether the mining working face can produce safely. There is one item If it does not meet the requirements, measures should be taken and re-evaluated until all conditions meet the requirements and the mining working surface can be produced safely.

4.2 Preparation for evaluation

4.2.1 Basic information

Collect mine hydrogeology type reports, various special water damage risk assessment reports, survey reports on hidden disaster-causing geological factors, and the "three water hazard prevention and control" reports. "Area" management report, mining working face geophysical prospecting results report, geological description, water exploration and release design, water exploration and release summary, past mining activity data and other basic Based on the basic data, we will comprehensively analyze and evaluate the detection, treatment, verification and evaluation of various water hazards in the mining working face.

4.2.2 Water prevention and control measures

Evaluate the pertinence, implementation and effectiveness of special water prevention and control measures for the main types of water damage in mining working surfaces.