A device and method for monitoring the development of mining cracks in the coal seam floor
A coal seam floor and monitoring device technology, applied in the direction of measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, etc., can solve problems such as cracks in the coal seam floor
Active Publication Date: 2018-08-10
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] In the prior art, there is no monitoring equipment that can monitor well and develop cracks in the floor of the coal seam, thereby preventing water inrush from the floor
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[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0025] refer to figure 1 , figure 2 , Figure 4 As shown, a coal seam floor mining fracture development monitoring device provided by the present invention includes a reinforcement layer 2 laid on the coal seam floor 1, and a plurality of casing assemblies 4 are sequentially arranged on the reinforcement layer 2 along the roadway 3, and the casing assembly 4 Through the reinforcement layer 2 and penetrate into the coal seam floor 1, the casing assembly 4 includes a pipe body 41 and a sealing pipe cover 42 on the pipe body 41, a mounting column 43 is installed in the pipe body 41, and a water pressure sensor is installed at the bottom of the mou...
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The invention discloses an apparatus and a device for monitoring mining-induced fracture development of a coal seam floor. The apparatus comprises a reinforced layer which is laid on the coal seam floor; the reinforced layer is provided with several casing components which are arranged in order along a tunnel, the casing components traverse the reinforced layer and penetrate the coal seam floor, each casing component comprises a casing body and a tube cap on the casing body for sealing, wherein the casing body is internally provided with an installation column, the bottom of the installation column is provided with a hydraulic pressure sensor and an ultrasonic wave flaw detection module, and a side wall of the casing body is provided with a vertical stress sensor and a transversal stress sensor; each casing component is connected to a monitoring center, the monitoring center comprises a control module, a hydraulic pressure monitoring module, a fracture flaw detection monitoring module, a stress monitoring module, a timing module, and an alarm module. After the water pressure, the fracture and the stress are transmitted to the monitoring center together, the monitoring center is used for determining whether water outburst risks exist in the coal seam floor, so that rapid response can be carried out.
Description
technical field [0001] The invention relates to the technical field of coal mine excavation, in particular to a device and method for monitoring development of mining cracks on a coal seam floor. Background technique [0002] Water inrush from the coal seam floor is essentially the deformation, destruction, and structural activation of the floor aquifer induced by mining stress, forming one or more water-conducting channels in the floor, and inducing high-pressure water in the floor aquifer to break into the excavation space along the water-conducting channels. process. [0003] In the 1990s, the Xi’an Branch of the Academy of Coal Sciences proposed that floor water inrush is the result of the joint action of rock (floor sand shale), water (floor confined water), and stress (mining stress and ground stress). The mining pressure causes water-conducting cracks of a certain depth to appear in the water-resisting layer of the floor, which reduces the strength of the rock mass, ...
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IPC IPC(8): G01N29/04G01D21/02
CPCG01D21/02G01N29/04G01N2291/0289
Inventor 刘伟韬李光马鹤宋文成孟祥喜李敏
Owner SHANDONG UNIV OF SCI & TECH