Method for evaluating quality of rock stratum while drilling

A quality evaluation and stratum technology, applied in surveying, earthwork drilling, wellbore/well parts, etc., can solve problems such as inability to continuously evaluate the quality of roadway rock strata, and achieve the effect of efficient continuous drilling, simple process and easy operation

Active Publication Date: 2013-08-14
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The present invention solves the problem that the roadway rock formation quality cannot be continuously evaluated at present, and provides a feasible, efficient, continuous roadway surrounding rock quality evaluation method that does not affect the excavation support

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  • Method for evaluating quality of rock stratum while drilling

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with the accompanying drawings.

[0026] The invention is a rock formation quality evaluation method while drilling. In the process of implementation, the stratification parameters of the surrounding rock of the roadway are first determined through geological drilling or geological data, so as to have an overall grasp of the characteristics of the rock formations of the surrounding rock of the roadway. Then, in the roadway excavation and support process, by using a special detection drilling rig to record the changes in drilling parameters during the process of drilling bolts and anchor cables, and by processing the measured data, the formation of the rock formation near the drilling hole Quality Evaluation. As the excavation and support process progresses, the exploration drilling rig obtains continuous data, and the data of all measured holes are integrated to obtain continuous and detailed quality ...

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Abstract

The invention relates to a method for evaluating the quality of a rock stratum while drilling. The method is particularly applicable to evaluating the quality of rock strata in roadway engineering. The method includes determining stratification parameters of surrounding rock of a roadway by means of geological drilling or geological data consultation so as to integrally know characteristics of the stratum of the surrounding rock of the roadway; acquiring drilling parameters by the aid of a detection drilling machine when holes for anchor rods and anchor ropes are drilled in a roadway driving and supporting procedure, processing data of the measured parameters and evaluating the quality of the stratum near the drilled holes; and acquiring continuous data by the aid of the detection drilling machine along with continuous roadway driving, integrating all data of drilled holes to obtain continuous evaluation for the quality of the stratum and providing a corresponding supporting process according to the continuous evaluation for the quality of the stratum. The method has the advantage that the method is a feasible and efficient method for continuously evaluating the quality of the surrounding rock of the roadway without affecting the driving and supporting procedure.

Description

technical field [0001] The invention relates to a rock formation quality evaluation method while drilling, which is especially suitable for evaluating the rock formation quality in shaft engineering. Background technique [0002] As a safe channel for coal mine production, the stability of the roadway is very important, so it is self-evident to master the rock formation quality evaluation method of the roadway surrounding rock. On the one hand, the reasonable control and maintenance of the roadway is related to the normal production of the mine and the life safety of the workers, while the accidents in the roadway are mostly caused by the unscientific support design caused by the uncertainty of the quality of the surrounding rock of the roadway. As an important basis for roadway support design and other coal mine engineering activities, it is particularly important. On the other hand, with the increase of coal mine mining depth, the control problem of weak and broken surrou...

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Application Information

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IPC IPC(8): E21B47/00E21B49/00
Inventor 张农孟子浩陈红李宝玉薛飞
Owner CHINA UNIV OF MINING & TECH
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