A construction method of large-aperture emergency rescue drilling
A construction method and emergency rescue technology, applied in drilling equipment and methods, earth-moving drilling, drilling equipment, etc., can solve problems such as large accident hazards and losses, gas roof falling, and rescuers unable to carry out underground near-rescue, etc. Achieve the effect of ensuring safe production, avoiding secondary accidents, reducing mortality and property losses
Active Publication Date: 2020-09-18
北京大地高科地质勘查有限公司
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Problems solved by technology
Although the trend of accidents in production safety has weakened, serious accidents still occur frequently, and the damage and loss of accidents are very huge
[0003] Gas explosions, water seepage in old kilns, floor water inrush, and roof caving are still the main disasters in coal mine production, and when accidents and disasters occur, rescuers are often unable to carry out underground rescue operations
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[0035] 1. Open rotary excavation and drilling construction at the found rescue point
[0036] Use a rotary drilling rig to carry a φ1000mm rotary drill bit to excavate to drill through the broken zone 5m and complete the drilling. The hole depth is 50m, and the φ820mm×10mm spiral wall pipe is lowered and then cemented. The total length is 48m and the butt welding connection is completed. P.O.42.5# cement for cementing operations.
[0037] 2. Small-diameter guide hole construction
[0038] The φ216mm drill bit is used for construction, and the directional drilling technology is used to construct in the direction of the roadway. Drilling stops at 20m above the underground roadway, and the well depth is 206m.
[0039] 3. Large-diameter drilling and reaming drilling construction
[0040] Adopt φ711mm non-penetrating down-the-hole hammer drill bit, adopt air reverse circulation drilling technology, carry out reaming drilling along the small-diameter pilot hole, drill through the ...
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The invention relates to a construction method for a large-aperture emergency rescue drill hole. The construction method comprises the following steps that S101, finding a rescue point capable of directly carrying out well lifting rescue on underground trapped persons in an accident mining area; S102, drilling a first large-hole-diameter drill hole at the rescue point, putting a first large-hole-diameter casing pipe into the first large-hole-diameter drill hole, and then performing well cementation to form a first section of cemented well; S103, continuously drilling from the bottom of the first section of cemented well to a preset distance above an underground roadway or an underground tunnel, and stopping drilling to form a small-hole-diameter guide hole; and S104, conducting hole expanding drilling along the small-hole-diameter guide hole to the underground roadway or underground tunnel, stopping drilling, and putting a second large-hole-diameter casing pipe in the formed hole to form a stable second large-hole-diameter drill hole. According to the invention, trapped persons are directly lifted through a descending rescue capsule or other well lifting devices, meanwhile, secondary accidents caused by high risks of underground rescue to rescuers are avoided, the mine disaster rescue success rate can be increased, the mine production mortality and property loss are reduced, and safe production of a mine is guaranteed.
Description
technical field [0001] The invention relates to the field of drilling technology for large-diameter drilling in mine tunnels, in particular to a construction method for large-diameter emergency rescue drilling. Background technique [0002] In recent years, with the gradual expansion of underground mining depth, speed and scale, underground geological conditions have become more complex. Although the trend of production safety accidents has weakened, serious accidents still occur frequently, and the damage and loss of accidents are huge. [0003] Gas explosions, water seepage in old kilns, floor water inrush, and roof caving are still the main disasters in coal mine production, and when accidents and disasters occur, rescuers are often unable to carry out underground rescue. At this time, drilling rescue has become the primary choice for rescue work. Especially in the case of downhole hazards that cannot be eliminated in a short time, rescue through large-aperture drilling...
Claims
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IPC IPC(8): E21B7/00E21B7/28E21F11/00
CPCE21B7/00E21B7/28E21F11/00
Inventor 张小龙王越黄勇刘永彬熊涛朱宝存张彪孙宁孙鹏杰王玥
Owner 北京大地高科地质勘查有限公司