Drilling detecting integrated system and method for overlying strata fracture detection

Abstract

The invention discloses a drilling detecting integrated system and method for overlying strata fracture detection, and particularly relates to the field of overlying strata fracture development regulation detection under a coal mine well. The invention aims at solving the defects exist in the existing overlying strata fracture detection that excavation, drilling holes and the overlying strata fracture detection can not be conducted simultaneously, a certain measurement error or even hole collapse occurs due to the fact that new cracks occur when the drilling holes are placed for a long time, and whether hole sealing is finished or not and the reliability of the hole sealing can not be verified artificially in the detection process. The drilling detecting integrated system comprises a detection pipe, a drilling device and a control device; the upper portion of a rod body of the detection pipe is sleeved with a hole sealing capsule, the two ends of the hole sealing capsule are fixed through upper convex plates and lower convex plates which are located on the detection pipe respectively, an electric three-way ball valve is arranged inside the hole sealing capsule, and a groove is formed in the portion, at the lower portion of one convex plate, of the rod body of the detection pipe.

Description

technical field [0001] The invention relates to the field of detecting the development law of overlying rock fissures in coal mines, in particular to an integrated drilling and measuring system and method for detecting overlying rock fissures. Background technique [0002] The underground mining of coal mines causes the redistribution of the stress field and deformation field of the surrounding rock mass, resulting in different degrees of damage to the overlying rock strata. Among them, rock mining fractures are channels for water inrush in coal mines, and the evolution law of mining fractures is an important theoretical basis for judging the occurrence conditions of mine water inrush, predicting mine water inrush, and formulating mine water disaster prevention and control countermeasures. [0003] In the prior art, a patented overlying rock water-guiding fissure zone monitoring system and its detection drilling method (application number 201110457012.3,) and a coal seam goa...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to detect existing overlying rock fissures. Excavation drilling and overlying rock fissure detection cannot be carried out at the same time, and new cracks will be generated when the borehole is placed for a long time, resulting in certain measurement errors or even hole collapse, and Whether the hole sealing is completed during the detection process and the reliability of the sealing cannot be verified manually. A drilling-measuring integrated system and method for the detection of overlying rock cracks is proposed.

Images