Simulation test system and monitoring method for roof water gushing and sand intrusion disaster induced by coal seam mining

Abstract

The invention discloses a simulation test system and monitoring method for a disaster of roof water burst and sand inrush induced by coal seam mining. The simulation test system comprises a bracket, wherein a test bin is arranged inside the bracket; a movable coal-mining simulating dragging plate is arranged at the bottom of the test bin; a water-sand gathering channel obliquely arranged is arranged below the coal-mining simulating dragging plate; a water-sand collecting device is arranged at the outlet of the water-sand gathering channel; the test bin is formed by a bottom plate, a right side wall, a front transparent plate body, a back transparent plate body and the coal-mining simulating dragging plate; a plurality of pore water pressure sensors and a plurality of pressure sensors are arranged inside the test bin. According to the invention, the simulation test for the disaster of the roof water burst and sand inrush induced by coal seam mining is carried out by adopting the technical scheme that the test bin is filled with coal measure strata simulating materials, so as to obtain water-sand inrush parameters of different stratum combinations, therefore, the identification degree of the characteristics of the disaster of operating face water burst and sand inrush induced by coal seam mining is improved.

Description

technical field [0001] The invention relates to a simulation test system and a monitoring method for roof water gushing and sand intrusion disasters induced by coal seam mining. Background technique [0002] In recent years, with the continuous increase of coal mine mining intensity and the continuous increase of the mining upper limit, the overlying loose aquifer is affected by mining, and the water-sand mixture with high sand content breaks into the underground working face, resulting in property losses and even casualties. Geological disasters occur from time to time, which pose a great threat to mine safety and seriously restrict the development of the coal industry. On April 20, 1990, the Ciyaowan Coal Mine suffered a disaster of roof fall, water inrush and sand inrush, with water gushing up to 200m 3 / h, the total amount of broken sand is 4000m 3 As a result, the 304m-long belt roadway in the first mining area was filled with sand to a thickness of 2m (the height of ...

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Problems solved by technology

[0002] In recent years, with the continuous increase of coal mine mining intensity and the continuous increase of the mining upper limit, the overlying loose aquifer is affected by mining, and the water-sand mixture with high sand content breaks into the underground working face, resulting in property losses and even casualties. Geological disasters occur from time to time, which pose a great threat to the safe production of mines and seriously restrict the development of the coal industry

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