MULTIPOINT COAL AND ROCK MASS STRESS REAL-TIME MONITORING DEVICE AND METHOD

摘要

A multipoint coal and rock mass stress real-time monitoring device. The device is composed of a plurality of capsule pressure sensors (1), connection rods (2), three-way valves (3), a multichannel monitor (4), a multichannel control valve (5), first high-pressure oil pipes (6), second high-pressure oil pipes (7), third high-pressure oil pipes (8), a four high-pressure oil pipe (9), a high-pressure oil pump (10) and monitoring substations (11). The present invention also relates to a multipoint coal and rock mass stress real-time monitoring method. Oil is injected into each capsule pressure sensor (1) that is arranged in a drilled hole through the multi-channel control valve (5), so that oil pressure inside each capsule pressure sensor (1) reaches the preset pressure, and the capsule pressure sensors and the coal and rock mass are well coupled; monitoring signals are synchronously collected, converted, stored and displayed by the multichannel monitor (4) or are transferred to a remote monitoring center through the monitoring substations (11). The device and method can be used for coal and rock dynamic disaster monitoring early warning such as coal and rock mass stress monitoring, mine pressure analysis, rock burst and coal and gas rush, and the stress and changes of the stress of multiple measuring points can be measured at the same time in the multiple drilled holes of the coal and rock mass.