阅读说明：本技术 一种钻孔位移监测装置 (Drilling displacement monitoring device ) 是由 潘一山 郑文红 王爱文 代连朋 张建卓 吕祥锋 郭建霖 陈建强 付宏源 于 2021-01-13 设计创作，主要内容包括：一种钻孔位移监测装置,包括定距杆和测量机构,测量机构四个为一组且沿定距杆周向均布,沿定距杆长度方向分布有若干组测量机构；测量机构包括微型液压缸、传力板、弧形弹簧片、应变片、螺套、螺杆及垫板；微型液压缸缸筒与定距杆固连,微型液压缸活塞杆与传力板背面中心处垂直固连；微型液压缸通过液压管路与钻孔外部液压站液控连接；弧形弹簧片内弧面朝向传力板且边沿与传力板正面固连；应变片固定贴覆在弧形弹簧片内弧面上,应变片通过导线与钻孔外部应变仪电连接；螺套固连在弧形弹簧片外弧面中心处且与微型液压缸活塞杆同轴分布；螺杆一端与螺套同轴螺接在一起,另一端与垫板背面中心处固连；垫板正面与钻孔内孔壁顶靠接触配合。(A drilling displacement monitoring device comprises distance rods and measuring mechanisms, wherein four measuring mechanisms are in a group and are uniformly distributed along the circumferential direction of the distance rods, and a plurality of groups of measuring mechanisms are distributed along the length direction of the distance rods; the measuring mechanism comprises a micro hydraulic cylinder, a force transmission plate, an arc-shaped spring piece, a strain gauge, a threaded sleeve, a screw rod and a base plate; the cylinder barrel of the miniature hydraulic cylinder is fixedly connected with the distance rod, and the piston rod of the miniature hydraulic cylinder is vertically and fixedly connected with the center of the back surface of the dowel plate; the micro hydraulic cylinder is hydraulically controlled and connected with a hydraulic station outside the drill hole through a hydraulic pipeline; the inner arc surface of the arc spring piece faces the force transmission plate, and the edge of the arc spring piece is fixedly connected with the front surface of the force transmission plate; the strain gauge is fixedly attached to the inner arc surface of the arc-shaped spring piece and is electrically connected with a strain gauge outside the drill hole through a lead; the threaded sleeve is fixedly connected to the center of the outer arc surface of the arc-shaped spring piece and is coaxially distributed with the piston rod of the micro hydraulic cylinder; one end of the screw rod is coaxially screwed with the threaded sleeve, and the other end of the screw rod is fixedly connected with the center of the back of the base plate; the front surface of the base plate is in abutting contact fit with the inner hole wall of the drill hole.)

1. A borehole displacement monitoring device, characterized in that: including distance pole and measuring mechanism, four measuring mechanism are a set of, and four measuring mechanism set up along distance pole circumferencial direction equipartition, and it has a plurality of measuring mechanism of group to distribute along distance pole length direction.

2. A borehole displacement monitoring device according to claim 1, characterised in that: the measuring mechanism comprises a micro hydraulic cylinder, a force transmission plate, an arc-shaped spring piece, a strain gauge, a threaded sleeve, a screw rod and a base plate; the end part of a cylinder barrel of the micro hydraulic cylinder is fixedly connected to a rod body of the distance rod, the center of the back surface of the force transfer plate is fixedly connected with the top end of a piston rod of the micro hydraulic cylinder, and the force transfer plate is perpendicular to the piston rod of the micro hydraulic cylinder; the miniature hydraulic cylinder is in hydraulic control connection with a hydraulic station outside the drill hole through a hydraulic pipeline; the inner arc surface of the arc-shaped spring piece faces the force transmission plate, and the edge of the arc-shaped spring piece is fixedly connected with the front surface of the force transmission plate; the strain gauge is fixedly attached to the inner arc surface of the arc-shaped spring piece and is electrically connected with a strain gauge outside the drill hole through a lead; one end of the threaded sleeve is fixedly connected to the center of the outer arc surface of the arc-shaped spring piece, and the threaded sleeve and a piston rod of the micro hydraulic cylinder are coaxially distributed; one end of the screw rod is coaxially screwed with the threaded sleeve, and the center of the back of the base plate is fixedly connected with the other end of the screw rod; the front surface of the base plate is in abutting contact fit with the inner hole wall of the drilled hole.

Technical Field

The invention belongs to the technical field of coal mine safety, and particularly relates to a drilling hole displacement monitoring device.

Background

In the coal mining process, the stress concentration degree of the coal body of the surrounding rock of the roadway can be reflected through the deformation of different depths of the surrounding rock drill hole and the deformation speed of the surrounding rock, so that the position of the peak value of the supporting pressure can be judged in an auxiliary mode, the impact danger degree can be monitored, and the surrounding rock with the impact danger can be guided to determine the drilling pressure relief technical parameters. Therefore, borehole displacement monitoring is an important rock burst monitoring means. However, special instruments for monitoring the displacement of the surrounding rock coal body are very deficient at the present stage, and for some existing monitoring instruments, the defects of complex structure, poor economical efficiency and poor adaptability generally exist.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a drilling hole displacement monitoring device which has the characteristics of simple structure, good economy and strong adaptability, can meet the displacement monitoring requirements of drilling holes in various diameter ranges, can monitor the all-dimensional displacement of the drilling holes, and can monitor the displacement of any depth position of the drilling holes according to the requirements.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a drilling displacement monitoring devices, includes distance pole and measuring mechanism, four of measuring mechanism are a set of, and four measuring mechanism set up along distance pole circumferencial direction equipartition, and it has a plurality of groups of measuring mechanism to distribute along distance pole length direction.

The measuring mechanism comprises a micro hydraulic cylinder, a force transmission plate, an arc-shaped spring piece, a strain gauge, a threaded sleeve, a screw rod and a base plate; the end part of a cylinder barrel of the micro hydraulic cylinder is fixedly connected to a rod body of the distance rod, the center of the back surface of the force transfer plate is fixedly connected with the top end of a piston rod of the micro hydraulic cylinder, and the force transfer plate is perpendicular to the piston rod of the micro hydraulic cylinder; the miniature hydraulic cylinder is in hydraulic control connection with a hydraulic station outside the drill hole through a hydraulic pipeline; the inner arc surface of the arc-shaped spring piece faces the force transmission plate, and the edge of the arc-shaped spring piece is fixedly connected with the front surface of the force transmission plate; the strain gauge is fixedly attached to the inner arc surface of the arc-shaped spring piece and is electrically connected with a strain gauge outside the drill hole through a lead; one end of the threaded sleeve is fixedly connected to the center of the outer arc surface of the arc-shaped spring piece, and the threaded sleeve and a piston rod of the micro hydraulic cylinder are coaxially distributed; one end of the screw rod is coaxially screwed with the threaded sleeve, and the center of the back of the base plate is fixedly connected with the other end of the screw rod; the front surface of the base plate is in abutting contact fit with the inner hole wall of the drilled hole.

The invention has the beneficial effects that:

the invention provides a drilling hole displacement monitoring device which has the characteristics of simple structure, good economy and strong adaptability, can meet the displacement monitoring requirements of drilling holes in various diameter ranges, can monitor the omnibearing displacement of the drilling holes, and can monitor the displacement of any depth position of the drilling holes according to the requirements.

Drawings

FIG. 1 is a schematic diagram of a borehole displacement monitoring apparatus (from an axial view) according to the present invention;

FIG. 2 is a schematic diagram of a borehole displacement monitoring apparatus (radial view) according to the present invention;

in the figure, 1-distance rod, 2-measuring mechanism, 3-miniature hydraulic cylinder, 4-force transmission plate, 5-arc spring piece, 6-strain gauge, 7-threaded sleeve, 8-screw rod, 9-backing plate.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1 and 2, a drilling displacement monitoring device comprises a distance rod 1 and measuring mechanisms 2, wherein the four measuring mechanisms 2 are in a group, the four measuring mechanisms 2 are uniformly distributed along the circumferential direction of the distance rod 1, and a plurality of groups of measuring mechanisms 2 are distributed along the length direction of the distance rod 1.

The measuring mechanism 2 comprises a micro hydraulic cylinder 3, a force transmission plate 4, an arc-shaped spring piece 5, a strain gauge 6, a threaded sleeve 7, a screw 8 and a backing plate 9; the end part of a cylinder barrel of the micro hydraulic cylinder 3 is fixedly connected to a rod body of the distance rod 1, the center of the back surface of the force transfer plate 4 is fixedly connected with the top end of a piston rod of the micro hydraulic cylinder 3, and the force transfer plate 4 is perpendicular to a piston rod of the micro hydraulic cylinder 3; the micro hydraulic cylinder 3 is in hydraulic control connection with a hydraulic station outside the drill hole through a hydraulic pipeline; the inner arc surface of the arc-shaped spring piece 5 faces the force transmission plate 4, and the edge of the arc-shaped spring piece 5 is fixedly connected with the front surface of the force transmission plate 4; the strain gauge 6 is fixedly attached to the inner arc surface of the arc-shaped spring piece 5, and the strain gauge 6 is electrically connected with a strain gauge outside the drilled hole through a lead; one end of the threaded sleeve 7 is fixedly connected to the center of the outer arc surface of the arc-shaped spring piece 5, and the threaded sleeve 7 and a piston rod of the micro hydraulic cylinder 3 are coaxially distributed; one end of the screw rod 8 is coaxially screwed with the threaded sleeve 7, and the center of the back of the backing plate 9 is fixedly connected with the other end of the screw rod 8; the front surface of the backing plate 9 is in abutting contact fit with the inner hole wall of the drill hole.

The one-time use process of the present invention is described below with reference to the accompanying drawings:

according to the drilling depth, the measuring mechanisms 2 with specified groups are arranged in the length direction of the distance rod 1 according to design requirements, all the miniature hydraulic cylinders 3 are in hydraulic control connection with a hydraulic station outside a drilled hole through respective hydraulic pipelines, all the strain gauges 6 are electrically connected with strain gauges outside the drilled hole through respective leads, all the miniature hydraulic cylinders 3 are regulated and controlled, normal action of each miniature hydraulic cylinder 3 is guaranteed, the strain gauges are checked, and the strain gauges can normally receive signals of all the strain gauges 6.

After the accurate work is finished, all the screw rods 8 are screwed and adjusted according to the diameter of the drilled hole, so that the elongation of the screw rods 8 relative to the screw sleeve 7 is adjusted (when the diameter of the drilled hole is too large and exceeds the current elongation adjustment range of the screw rods 8, the requirement can be met by replacing the screw rods 8 with longer lengths), the whole drilling displacement monitoring device is ensured to be matched with the diameter of the drilled hole, then the adjusted whole device is conveyed into the drilled hole, a certain installation gap is reserved between the whole device and the drilled hole at the moment, after the device is installed in place, piston rods of all the micro hydraulic cylinders 3 are controlled to stretch out, the force transmission plate 4, the arc-shaped spring pieces 5, the screw sleeve 7, the screw rods 8 and the backing plate 9 are driven to move towards the hole wall until the backing plate 9 abuts against the inner hole wall of the drilled hole, the arc-shaped spring pieces 5 can elastically deform in the jacking process, and the elastic deformation of the arc-, meanwhile, whether the jacking degree of the device and the inner hole wall of the drill hole meets the requirement or not is judged by observing a strain signal which is acquired on a strain gauge and output by the strain gauge 6. After the device is fixed in the drill hole, the strain data on the strain gauge are reset to zero, then the displacement monitoring of the drill hole is formally carried out, and the displacement condition of the drill hole is judged by observing the strain data collected by the strain gauge.

The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.