CN-122014208-A - While-drilling monitoring device of jumbolter and while-drilling identification method of stratum interface

CN122014208ACN 122014208 ACN122014208 ACN 122014208ACN-122014208-A

Abstract

The invention provides a monitoring device of an anchor drilling machine while drilling and a rock stratum interface while drilling identification method, and relates to the technical field of rock-soil drilling. The device comprises a fixing frame, a telescopic frame, a thrust sensor, a torque rotating speed sensor, a laser range finder and a data processing unit, wherein thrust, torque, rotating speed and displacement signals in the drilling process of the jumbolter are synchronously acquired in real time through integrating the sensors, the data processing unit calculates the net drilling specific work, and the stratum interface and thickness distribution are identified based on the change of the net drilling specific work. The invention also provides a rock stratum interface while drilling identification method, which comprises the steps of carrying out moving average filtering on net drilling specific power data, automatically identifying discrete points by adopting a clustering algorithm, calibrating the position of the rock stratum interface and calculating the thickness of each rock stratum. The method can accurately identify the rock stratum interface and thickness distribution in real time, has the advantages of strong robustness and good adaptability, and provides a reliable basis for dynamic design of roadway anchor bolt support.

Inventors

ZHAO TONGBIN
Wu Shaoang
ZHAO ZHIGANG
XING MINGLU
HUANG BIN
Yin tuo

Assignees

山东科技大学

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. An jumbolter monitoring device while drilling, characterized by comprising: the lower end of the fixing frame is provided with a first assembling part; The telescopic frame is in sliding fit with the fixed frame, can extend and retract relative to the fixed frame, the upper end of the telescopic frame is provided with a second assembly part, and the telescopic frame is also provided with a third assembly part; The thrust sensor is arranged at the first assembly part and used for collecting thrust signals in the drilling process of the jumbolter; the torque and rotation speed sensor is arranged on the second assembly part and used for collecting a torque signal and a rotation speed signal in the drilling process of the jumbolter; The laser range finder is arranged on the third assembly part and is used for collecting displacement signals in the drilling process of the jumbolter; And the data processing unit is respectively connected with the thrust sensor, the torque rotating speed sensor and the laser range finder signal and is used for receiving and processing the thrust signal, the torque signal, the rotating speed signal and the displacement signal to obtain the net drilling specific work and identifying the stratum interface and the thickness distribution based on the change of the net drilling specific work.
2. The jumbolter while drilling monitoring device of claim 1, The lower extreme of mount is to one side buckling formation first assembly portion, and first assembly portion arranges along the horizontal direction, and the bottom of roof bolter assembles on first assembly portion, pushes away force sensor and is located between first assembly portion and the bottom of roof bolter.
3. The jumbolter while drilling monitoring device of claim 1, The upper end of the expansion bracket is bent to one side to form a second assembly part, the second assembly part is arranged along the horizontal direction, the upper end face and the lower end face of the rotating end of the torque rotation speed sensor are respectively connected with a first assembly sleeve and a second assembly sleeve, the first assembly sleeve is connected with a drill rod, and the second assembly sleeve is connected with an output rotating shaft of the jumbolter.
4. The jumbolter while drilling monitoring device of claim 1, The telescopic frame stretches and contracts relative to the fixed frame along with the lifting and lowering of the gas leg of the jumbolter.
5. The jumbolter while drilling monitoring device of claim 1, The data processing unit comprises a signal acquisition instrument and an intelligent terminal, wherein the intelligent terminal is respectively connected with the thrust sensor, the torque rotation speed sensor and the laser range finder through signals of the signal acquisition instrument, the signal acquisition instrument is used for receiving and converting signals, and the intelligent terminal is used for calculating net drilling specific work and executing a stratum interface and thickness distribution identification algorithm.
6. The jumbolter while drilling monitoring device of claim 5, The intelligent terminal is set to be an explosion-proof intelligent handheld terminal.
7. The jumbolter while drilling monitoring device of claim 5, The calculation formula of the net drilling specific work is as follows: ; In the formula, Work for net drilling ratio; The drilling speed of the anchor rod drilling machine is obtained by displacement and drilling time in the drilling process of the anchor rod drilling machine, t is drilling time, N is rotating speed in the drilling process of the anchor rod drilling machine, M is torque in the drilling process of the anchor rod drilling machine, mu is dynamic friction coefficient, r is the radius of the inner wall of a drill hole, and L is drilling depth.
8. A method for identifying a rock stratum interface while drilling, which is applied to the jumbolter while drilling monitoring device according to any one of claims 1 to 7, and is characterized in that the method comprises the following steps: S1, assembling and connecting a monitoring device while drilling of the jumbolter and the jumbolter into a whole; S2, drilling an anchor rod hole into a rock stratum through an anchor rod drilling machine, collecting thrust signals in the drilling process of the anchor rod drilling machine in real time through a thrust sensor, collecting torque signals and rotating speed signals in the drilling process of the anchor rod drilling machine in real time through a torque rotating speed sensor, and collecting displacement signals in the drilling process of the anchor rod drilling machine in real time through a laser range finder; S3, the data processing unit receives and processes the thrust signal, the torque signal, the rotating speed signal and the displacement signal to obtain the net drilling specific work; the calculation formula of the net drilling specific work is as follows: ; wherein: work for net drilling ratio; the drilling speed of the anchor rod drilling machine is obtained by displacement and drilling time in the drilling process of the anchor rod drilling machine, t is the drilling time, N is the rotating speed in the drilling process of the anchor rod drilling machine, M is the torque in the drilling process of the anchor rod drilling machine, mu is the dynamic friction coefficient, r is the radius of the inner wall of a drill hole, and L is the drilling depth; s4, smooth filtering is carried out on the net drilling specific power data through a moving average filtering algorithm; S5, clustering the filtered net drilling specific power data by adopting a clustering algorithm; s6, extracting points exceeding a threshold value in the clustering result as discrete points, wherein the displacement corresponding to the discrete points is a rock stratum interface, and the difference between the distances of adjacent discrete points is the thickness of the rock stratum.
9. A method of formation interface identification while drilling as claimed in claim 8, S4, a sliding average filtering algorithm adopts a five-point three-time smoothing method, and five adjacent data points are used for calculating new data points so as to achieve a smoothing effect and remove noise of net drilling specific work data; Wherein, the moving average filtering algorithm is as follows: ; wherein: y (n) is a new data sequence after filtering, y (i-2), y (i-1), y (i), y (i+1), and y (i+2) represents the i-th point of the original data sequence and the values of two points on the front side and the rear side of the i-th point.
10. A method of formation interface identification while drilling as claimed in claim 8, S5, based on the filtered net drilling specific power data, the clustering algorithm calculates intra-cluster error squares and SSEs of different K values through an elbow rule, draws an elbow graph of the K values and the SSEs, and completes data clustering through iteration, wherein the K value corresponding to the maximum inflection point of the slope is the optimal cluster number; Wherein, the error square sum SSE algorithm is as follows: ; wherein: For the jth data sample, Is the cluster center of the i-th cluster, Is the i-th cluster.

Description

While-drilling monitoring device of jumbolter and while-drilling identification method of stratum interface Technical Field The invention relates to the technical field of rock-soil drilling, in particular to a monitoring device of an anchor drilling machine while drilling and a rock stratum interface while drilling identification method. Background In the coal mine tunnel tunneling process, accurate identification of a rock stratum structure is a key precondition for anchor bolt support design. Traditional rock stratum interface identification methods mainly rely on geological drilling coring, rock mass structural features are obtained through rock core observation and indoor tests, and a drilling histogram is drawn. However, the method has obvious defects that firstly, the number of drilling holes is limited, the space change of the rock stratum is difficult to comprehensively reflect, secondly, the coring and testing processes are long in time consumption and high in cost, and the requirement of the rapid tunneling of the coal mine tunnel on the real-time property of geological information cannot be met. As the depth of coal mining is increased, the geological conditions of the roadway are more and more complex, and the limitations of the traditional method in terms of accuracy and timeliness are more and more remarkable. In the anchor bolt support process, a large number of anchor bolt holes are constructed, drilling parameters are correspondingly changed when the anchor bolt drilling machine drills holes in different strata, stratum information is obtained through real-time monitoring of the drilling parameters to identify stratum interfaces, and the anchor bolt support optimization design of the coal mine tunnel has an important effect and is also a key link for pushing coal mine tunnel tunneling intelligence. In addition, in practical application, the problems that the data processing method is poor in adaptability and influenced by different stratum properties, drilling machine models and operator differences exist, the change rule of drilling parameters is often unstable, and the method is difficult to directly use for stratum interface identification. Therefore, development of a monitoring device while drilling which can be adapted to a jumbolter is needed, and a rock stratum interface identification method with strong robustness is established, so that the rock stratum interface and the thickness can be obtained rapidly and accurately, and a reliable basis is provided for dynamic design of roadway anchor bolt support. Disclosure of Invention The invention aims to provide a monitoring device of an jumbolter while drilling and a method for identifying a rock stratum interface while drilling, so that the rock stratum interface and thickness distribution can be accurately identified in real time. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: a jumbolter while drilling monitoring device, comprising: the lower end of the fixing frame is provided with a first assembling part; The telescopic frame is in sliding fit with the fixed frame, can extend and retract relative to the fixed frame, the upper end of the telescopic frame is provided with a second assembly part, and the telescopic frame is also provided with a third assembly part; The thrust sensor is arranged at the first assembly part and used for collecting thrust signals in the drilling process of the jumbolter; the torque and rotation speed sensor is arranged on the second assembly part and used for collecting a torque signal and a rotation speed signal in the drilling process of the jumbolter; The laser range finder is arranged on the third assembly part and is used for collecting displacement signals in the drilling process of the jumbolter; And the data processing unit is respectively connected with the thrust sensor, the torque rotating speed sensor and the laser range finder signal and is used for receiving and processing the thrust signal, the torque signal, the rotating speed signal and the displacement signal to obtain the net drilling specific work and identifying the stratum interface and the thickness distribution based on the change of the net drilling specific work. Further, the lower end of the fixing frame is bent to one side to form the first assembly part, the first assembly part is arranged along the horizontal direction, the bottom of the jumbolter is assembled on the first assembly part, and the thrust sensor is located between the first assembly part and the bottom of the jumbolter. Further, the upper end of the expansion bracket is bent to one side to form the second assembly part, the second assembly part is arranged along the horizontal direction, the upper end face and the lower end face of the rotating end of the torque rotation speed sensor are respectively connected with the first assembly sleeve and the second assembly sleeve, the first assembly sleeve is