Recoverable type installation apparatus suitable for general slight shock sensor

Abstract

The invention relates to a recoverable type installation apparatus suitable for a general slight shock sensor. The center of an inner hole of a metal casing is movably connected with a sensor fixation device through a screw rod, the slight shock sensor is disposed in the sensor fixation device, the outer-end side of the metal casing is provided with a soft metal cup, the soft metal cup is filled up with quick-setting cement, the whole apparatus is integrally sent to the bottom of a borehole by use of an installation rod and is extruded forcefully for three to five minutes, at the moment, the soft metal cup is compressed to deform, the quick-setting cement is extruded out, and the whole apparatus is solidified at the bottom of the borehole. The installation apparatus provided by the invention is applied to a slight shock sensor which has a top portion with a threaded port and a regular-polygon-shaped tail portion, is also applied to a slight shock sensor which has a top portion without a threaded port and a non-regular-polygon-shaped tail portion in the same way. By use of the apparatus, the sensor can be installed at the bottom of the borehole, the mounting and dismounting are convenient, the sensor can be recovered, repeated utilization of the sensor is realized, and the monitoring cost is decreased.

Description

technical field [0001] The invention relates to a recoverable installation device suitable for common microseismic sensors, which belongs to the field of geotechnical engineering monitoring. Background technique [0002] Rock mass is a typical heterogeneous brittle material, which is rich in various defects (microcracks, pores, joints, impurities, etc.). The excavation of rock mass engineering such as underground mines, chambers and tunnels will lead to the generation, expansion and penetration of micro-cracks inside the rock mass, accompanied by the release of elastic waves. The microseismic monitoring technology is to detect the elastic waves released by the rock mass rupture process by arranging sensors in the rock mass, and then process and analyze the data to determine the time, spatial position and strength information of the rupture, and then analyze the engineering rock mass. Stability evaluation and analysis. At present, microseismic monitoring has become an impor...

AI Technical Summary

Problems solved by technology

The microseismic sensor installed outside the hole is easy to recycle, but it has the following two disadvantages: First, the sensor is installed outside the hole. Due to the influence of the loose ring on the surface wall, the effect of the microseismic signal monitored is poor.

Second, since the microseismic sensor is not placed in the hole, but installed outside the rock mass, passing vehicles and pedestrians are likely to damage the sensor

[0005] At present, in the sensor recyclable device, whether it is installed outside the sensor hole or installed in the sensor hole, the installed sensor is only suitable for the sensor with a threaded opening at the top and a regular polygon at the end. For the sensor without a threaded opening at the top, the tail is not a regular polygon. There is no way to install and remove the sensor

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