Horizontal hole ground stress measurement device based on BWSRM (Borehole Wall Stress Relief Method) principle

Abstract

The invention relates to a horizontal hole ground stress measurement device based on a BWSRM (Borehole Wall Stress Relief Method) principle, which is used for the technical field of measurement of stress of rocks in an underground cavity or a mine opening. The horizontal hole ground stress measurement device comprises a sealed cable joint, a stress measurement main working part, a multiway stress measuring instrument, a measurement control unit and a detection part, wherein the sealed cable joint is connected with the front end of the stress measurement main working part to be used as an output port for a power cable and a communication cable of the integral device; the stress measurement main working part is sequentially connected with the multiway stress measuring instrument, the measurement control unit and the detection part; the multiway stress measuring instrument is used for recording variation of stress on a working surface in the process that a thin-walled diamond core drill implements ring-shaped cutting on surrounding rocks of the hole wall of a borehole; and the detection part is used for observing and recording the quality condition of the hole wall of the borehole in the process of propelling integral equipment into the horizontal borehole to a working hole depth and providing reference basis for a local hole section which is selected to be subjected to stress relief. According to the invention, the integral measuring process is controlled sufficiently by an electromechanical integration technology through adopting a main control module; and test reliability and measurement accuracy can be greatly improved. The horizontal hole ground stress measurement device is convenient to carry and apply in the field and easy to operate in the field and can carry out three-dimensional ground stress actual measurement easily.

Description

technical field [0001] The invention relates to a device in the technical field of rock engineering measurement, in particular to a horizontal hole stress measurement device based on the BWSRM principle. Background technique [0002] The stress state of the crust is one of the most important properties of the crust, fully understanding and understanding the stress state of the crust is one of the very important issues in rock mechanics and engineering science. In-situ stress measurement is the most direct and reliable means to obtain crustal stress state data. Compared with other property parameters of rock materials, rock stress is a quantity that is difficult to measure accurately. Over the years, geologists, geophysicists and engineering technicians have done a lot of research work on the subject of in-situ stress measurement, but a satisfactory result has not yet been obtained. As far as the two in-situ stress measurement methods are currently most commonly used in rock...

AI Technical Summary

Problems solved by technology

The device is mainly used to measure the normal strain of the surrounding rock of the near-vertical borehole wall, and it cannot be applied to the three-dimensional geostress measurement of the rock mass in the underground cavern or the near-horizontal hole of the mine roadway, and its practicability is limited to a certain extent.

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