Coal mine overburden rock fracturing and well-ground-air joint monitoring method of surface rock movement

Abstract

The invention provides coal mine overburden rock fracturing and a well-ground-air joint monitoring method of surface rock movement, and belongs to the technical field of coal mine monitoring. The coalmine overburden rock fracturing and the well-ground-air joint monitoring method of surface rock movement comprise the following steps that step 1, unmanned aerial vehicle remote sensing monitoring iscarried out; step 2, surface level instrument monitoring is carried out; step 3, geological drill monitoring is carried out; step 4, micro-seismic monitoring is carried out; and step 5, comprehensiveanalysis is carried out. The coal mine overburden rock fracturing and the well-ground-air joint monitoring method of surface rock movement have the beneficial effects that the functions of well, ground and air monitoring are integrated into a whole, the monitoring processes interact and mutually complement, monitoring results are more accurate than monitoring through single method, surface subsidence value, surface subsidence time and rock stratum fracture shape can be accurately determined to provide a basis for the stability assessment of surface buildings, the determination of key strata in underground coal mining, and the judgment and prevention of dynamic pressure disasters induced by overburden failure in stopes.

Description

technical field [0001] The invention relates to the technical field of coal mine monitoring, in particular to a well-ground-air joint monitoring method for coal mine overlying rock breaking and surface rock movement. Background technique [0002] With the increase of coal mining depth and mining intensity, the stope space formed after coal seam mining is increasing, and the overlying strata in the goaf are fractured and deformed layer by layer until the surface, resulting in subsidence deformation and surface cracking. Or the steps sink, forming a subsidence pit or subsidence basin, which endangers the stability of ground buildings, water bodies, railways and other construction projects. At the same time, with the deformation and fracture of the overlying rock in the stope to the surface rock layer, the surface water and soil will be lost and the ecological environment will be seriously damaged. [0003] In coal mining, the distribution of joints and fissures in different c...

AI Technical Summary

Problems solved by technology

At the same time, with the deformation and fracture of the overlying rock in the stope to the surface rock layer, the surface water and soil loss will be caused, and the ecological environment will be seriously damaged.

[0003] In coal mining, the distribution of joints and fissures in different coal strata and the gas and water content are quite different, resulting in complex physical and mechanical properties of coal and rock mass; at the same time, different geological structures, different development layouts and mining methods of coal measure strata lead to a The different stress environments make the fracture behavior of the overlying rock more complicated

Under complex geological conditions and environmental influences, the effect of using a single monitoring method is often poor, the accuracy of monitoring data is insufficient, and the reliability is poor. Even under certain geological conditions, it is impossible to monitor overlying rock fracture and surface rock movement

At present, there is no effective method to accurately determine the subsidence value of the surface and the time of surface subsidence, as well as accurately determine the fracture form of the rock formation.

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