Developing hidden disaster factors in non-coal underground mines

1. Census objects

Non-coal underground mines with normal production and construction, rectification or rectification of production stoppage, resource integration, merger and reorganization.

2. Work content

(1) Survey and control of disaster factors caused by goaf and surrounding old kilns.

1. Goaf. For the remaining gob mined by open-pit method, the hanging roof gob mined by caving method, the gob formed in history, and other gob that has not been filled and controlled, the distribution of the gob (including location, shape, area, height, span, volume), formation time, water accumulation, etc. shall be ascertained by means of investigation and visit, geophysical exploration, geochemical exploration, drilling and three-dimensional scanning. The relevant information of the goaf is plotted on the relevant drawings, and the relevant data ledger of the mine is established. Take effective measures to control.

2. Surrounding abandoned mine (shaft). Find out the closure time, mining scope, distribution of shafts and lanes, water accumulation status of abandoned mine (shaft), and whether there is communication with the mine or the movement range of rock mass overlaps with each other, and plot relevant information on relevant drawings to establish the account of abandoned mine shafts and lanes; Take effective measures to control.

3. Goaf management projects that have been implemented. Find out the method, location and project situation of the goaf treatment project, analyze the effect of the treatment project, and plot the relevant information on the relevant drawings; Where governance is not in place, governance will be re-implemented.

(2) Survey and control of hydrogeological disaster factors.

1. The ground contains water. Identify hydrogeological conditions such as water-containing (isolated) layer, structural fracture zone, water-rich and water-conductance of roof and floor that affect the safe mining of mines, as well as the source, water quantity, water level, water quality and water-conductance channels of various water-containing bodies, predict the normal and maximum water inflow of mines, and classify the complexity of hydrogeological conditions. Improve the mine hydrogeological map, main middle hydrogeological plan and hydrogeological profile; Take effective measures to control.

2. Underground karst. The spatial distribution and development degree of karst in the mining area, solubility of soluble rock, reconstruction degree of soluble rock by structure, scale and filling of karst caves (including underground rivers), and surface karst collapse are ascertained, and relevant information of karst is plotted on relevant drawings. Take effective measures to control.

3. Surface water bodies. To ascertain the catchment, drainage and leakage of surface water systems such as rivers, lakes and reservoirs in the mining area and surrounding areas that have an impact on mine mining and relevant water conservancy projects, the drainage and prevention facilities of surface DAMS, ditches and drainage ditches, the local annual precipitation, the highest flood level, peak discharge and inundation extent, etc.; Take effective measures to control.

4. Close poor holes. Identify the location and sealing conditions of geological exploration boreholes and engineering construction boreholes within the mining scope, analyze the sealing quality of each borehole, and plot relevant information on relevant drawings; Take effective measures to control.

5. Implemented mine water control projects. Identify the methods, locations and conditions of surface and underground water control projects that have been implemented, analyze the effects of each water control project, and plot the relevant information on the relevant drawings; Where governance is not in place, governance will be re-implemented.

(3) Survey and control of disaster factors caused by ground pressure.

1. Main geological structure. Identify the structural position and main structural direction of the mining area, as well as the distribution, occurrence, shape, opening degree, roughness, filling and cementation characteristics, scale and water filling of all levels of the structural plane, determine the grade of the structural plane and the main adverse advantages of the structural plane, evaluate the rock mass structure and quality of the orebody and surrounding rock, carry out engineering geological zoning, and analyze its influence on the mining of the deposit. Take effective measures to control.

2. Ground pressure activity area. To identify the surface pressure in mines such as roof subsidence and caving, roadway slope, rock burst impact, pillar deformation and loss, fill compaction and roof fall, rock stratum movement and surface collapse caused by mining, analyze the characteristics of ground pressure in mining and the local high ground stress concentration area, and divide and delineate the rock strata strata and lot locations that are prone to rock burst. Take effective measures to control.

3. Mine ground pressure prevention work. To find out the working methods and effects of ground pressure control, such as stope roof management, roadway and stope support, monitoring and early warning, etc.; Where governance is not in place, governance will be re-implemented.