Method for determining vertical zoning of coal mine roof rock mass based on microseismic monitoring
A microseismic monitoring and microseismic technology, which is applied in seismology, measuring devices, geophysical measurement, etc., can solve problems such as deepening understanding, multiple applications of water-conducting fissure zones, and inaccurate drilling monitoring results, etc., to achieve the effect of easy determination
Active Publication Date: 2018-01-26
DALIAN UNIV OF TECH
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However, these methods also have certain problems. Numerical simulation and similar simulation methods often greatly simplify the actual situation on site, so the results are difficult to apply to the site.
The vertical borehole observation method comes from the direct observation of the site, but it has two major disadvantages: first, due to cost control on site, there are often fewer drill holes useful for observing the roof stratification, and the actual roof slate Because of different structures and lithologies, the height of the body often has a large difference, which causes inaccurate results of borehole monitoring; second, the objects of borehole observation are mainly macroscopic fractures, so this leads to vertical borehole observation. The method is often used to determine the water-conducting fracture zone, but it cannot be well applied to the further refinement of the rock mass roof zoning and the determination of deformation characteristics.
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[0032] (1) Establish a microseismic monitoring system in the monitored coal mine, and arrange microseismic detectors and lines according to the specific conditions of the working face. The microseismic detectors are arranged in the hard rock, close to the rock wall. Each group of microseismic geophones on the floor of the coal mine to be tested is connected with cables, and then connected to the microseismic data acquisition and monitoring substation set in the coal mine to form a complete monitoring network. There are two types of microseismic geophones: the first one, as shown in the figure, when the underground roadway space is available, 15 microseismic geophones are arranged along both sides of the roadway, and the distance between the microseismic geophones is controlled between 50m-100m ; second, when the underground roadway space does not have the conditions, 15 geophones are arranged in a roadway, and the boreholes for installing the microseismic geophones should be d...
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The invention belongs to the technical field of coal mine safety production and mining engineering, and relates to a coal mine roof rock mass vertical zone determination method based on micro-seismic monitoring. The technical effect of providing a coal mine roof rock mass vertical zone determination method based on micro-seismic monitoring is achieved. In the deformation and destruction process of roof rock mass, micro destroy is generated inevitably to cause energy release of the rock mass. As rock mass deformation and destruction have difference between zones, distribution of generated micro destroy and distribution of released energy have difference inevitably in the deformation and destruction process, and therefore micro-seismic monitoring is an essence monitoring method approaching roof rock mass zoning. Compared with other measurement modes, the coal mine roof rock mass vertical zoning determination method has an important advantage that the roof zones can be monitored without drilling.
Description
technical field [0001] The invention belongs to the technical fields of coal mine safety production and mining engineering, and relates to a method for determining vertical zoning of coal mine roof rock mass based on microseismic monitoring. Background technique [0002] Coal mine roof zoning, as several basic problems in underground mining, has a great impact on important issues such as surface deformation, underground support, gas drainage, and roof water damage. Therefore, many scholars have carried out research on rock movement. [0003] At present, the mainstream views on coal mine roof theory are three-zone theory—caving zone, fissure zone and bending subsidence zone, and four-zone theory—regional caving zone, fissure zone, expansion zone and compression zone. There are mainly vertical drilling observation method, numerical simulation and similar simulation to determine the height of strata zoning. These methods play a certain role in determining the height of layerin...
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IPC IPC(8): G01V1/00
CPCG01V1/00
Inventor 李连崇程关文唐春安马天辉于群
Owner DALIAN UNIV OF TECH