Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit

A formation cavity and drill bit technology, which is applied in drill bits, earth-moving drilling, drilling equipment, etc., can solve problems such as drilling deflection, stuck accident, and leakage of isolating casing flushing fluid.

Active Publication Date: 2012-07-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Drilling in these goafs and cavities often leads to drilling deviation accidents, buried drilling accidents caused by collapse and falling of blocks in the cavities, jamming accidents caused by dislocation of the drilling holes on the roof and floor of the cavities, accidents where the original drilling holes cannot be found, and drilling accidents. Drilling accidents in hollow roof pull grooves, drilling accidents where the drill pipe is thrown off in the hollows, accidents in which the isolation sleeve is swept off the drill bit in the hollows, and construction with complete leakage of flushing fluid, etc.

Method used

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  • Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit
  • Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit
  • Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit

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Embodiment

[0078] At 8:30 on July 1, 2006, when the 10404(2) working face of Jinan Huamei Mining Co., Ltd. was pushed out 40m, water came out. On July 5, the water inrush point of the night shift was 2601m 3 / h, and there is a tendency to continue to increase, flooding the north wing of the mine and causing the north wing to stop production. Aiming at the water outflow situation of the 10th layer coal, a water shutoff plan for grouting and water shutoff boreholes constructed from the ground was formulated. However, according to the analysis of the hydrogeological data of the working face, two of the four designed boreholes (Note 1 and Note 4) respectively pass through the three-layer goaf of Coal 8, Coal 9 and Coal 10, and one borehole (Note 3) It is necessary to pass through the goaf of Coal 8 and Coal 9. Three boreholes were actually constructed, namely Note 1, Note 3 and Note 4.

[0079] The depth and thickness of the bottom boundary of the three-layer goaf coal seam are: Coal 8: 2...

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Abstract

The invention discloses process for realizing grouting consolidation for aggregates filled in cavities of strata. Holes are drilled by a drill stem, and hydraulic cement is filled in the holes, so that filling of the aggregates is finished. The invention further discloses a jetting drill bit for realizing grouting consolidation for the aggregates filled in the cavities of the strata. The jetting drill bit consists of an upper joint, a jetting body and a drill bit body which are connected successively. Grouting consolidation operation is well carried out for aggregate accumulators filled in the cavities of the strata, so that the aggregates form a plain concrete body and have certain strength and stability, the plain concrete body is equivalent to an artificially constructed false stratum, the drilled holes assuredly penetrate through the cavities of the strata smoothly, and conditions are created for safe and smooth construction of the drilled holes.

Description

technical field [0001] The invention relates to a technique for grouting and consolidating aggregates filled in stratum cavities and a jet drill bit, belonging to the fields of geological exploration, water disaster prevention and control, basic construction and the like in mines, traffic tunnels, water conservancy and hydropower. Background technique [0002] At present, mine water disaster accidents, especially coal mine water disaster accidents, are one of the main accidents that affect the safety of employees and the economic benefits of mines. Coal mine water seepage accidents continue to occur every year. In the old mining areas that are seriously threatened by the Ordovician limestone water in the coal seam floor, especially in the old mining areas where the lower formation coal has been mined and the upper formation coal has formed a coal seam goaf, hydrological observation of the coal seam floor aquifer, mine well Grouting is used to block water in the water-filled ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/00E21B33/13
Inventor 张庆松潘光明侯艳平林春金张霄李红伟李鹏
Owner SHANDONG UNIV
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