DE2640136A1 - Deep-hole infusion method for coal seams - has forward and rear inflatable bladders with end ball valve and release connection between - Google Patents

Abstract

Deephole infusion method for coal mining embodies a forward (1) and rear (2) bladder connected up by pipes (4) and held at required spacing. A ball valve (6) at the bottom hole ensures that both infusion sondes provide a sealing effect at identical pressures. The releasable coupling (2) between the two bladders (1, 3) has an opposed thread so that when all other components are retrieved, this thread operates to leave the forward bladder within the hole. The sense of the other connections ensures that the remaining components are twisted round and withdrawn together.

Description

Description and explanation of the patent application

"2-chamber long-front impregnation device" in which long-front impregnation So far, holes from the seam stretches with approx.

up to a depth of 50 m, introduced approx. 50 m ahead of mining.

These holes are approximately 35mm in diameter and are about a soaking hose (7) and a soaking pump (8) over the sealed inflation chamber (3) Filled with water under pressure, so that the adjacent, mined Xohlerock i; is fully sucked in with water via capillary action, so that with mechanical degradation the coal a dust binding is largely guaranteed.

In the attached figure "A" is the schematic representation a long-front impregnation, as z. Z. is common, shown: with 1: the drinking hole with 2: a rupture disk with 3: the inflation chamber with 4: cement slurry with 5: a cement hose with 6: a cement pump with 7: soaking hose with inflation chamber (3) at the end with 8: the drinking pump The cementing guarantees that il area of the very cheap soaking hose that does not seal against the borehole wall, the water from the adjacent mountains, which has accumulated for soaking, does not flow out again to the beginning of the borehole.

This process technology is very complex manually and is intended according to the invention due to a cheaper and much less labor-intensive impregnation process be replaced.

In the accompanying Figure "B" is the subject matter of the invention "2-chamber long-front impregnating device" shown: with 1: the one at the deepest point of the borehole attached inflation chamber.

This inflation chamber, if it cannot be recovered, Remain in the hole because it has a disconnect clutch at (2).

Between the separating clutch (2) and the inflation chamber (3) is located a raw section that can be screwed together from individual tubes. These Raw section is marked with (4).

The entire unit of the long-front impregnation device is through at (5) a drinking hose feed connected to the drinking pump.

When you press the drinking pump, the water is released through a ball valve at the deepest of the borehole (6), until the inflation chamber (1) and (2) are sealed supported against the borehole.

At approx. 20 atm the ball valve opens and the water comes out of the entire impregnation unit at the front of the impregnation head and causes the coal to be soaked.

With this two-chamber long-front impregnation device according to the invention the guarantee that even with very cracked and fissured coal In the area of the 30hr hole, an intensive seal is guaranteed over the entire length is not like the cement, even with a change in the leading fighter pressure has no additional sealing properties after curing, but through the adjustment of the inflation chamber (1) and (2) keeps the absolute water supply at the deepest point of the borehole guaranteed, and thus an intensive deep drinking, which is necessary, carried out as requested.

Of course, the invention is not limited to the above in detail The form of training described and illustrated is limited, but there are numerous Modifications possible without deviating from the basic idea, a long-front impregnation device so to create that it consists of 2 inflation chambers, one in the deepest of the borehole is attached and the second in the area of the borehole mouth a sufficient seal guaranteed, so that a backflow of the injected along the entire length of the borehole Water from the borehole is absolutely prevented.

Patent claims:

Claims (1)

Claims: Claim 1: Long-front impregnation process characterized in that that it consists of a front and rear inflation chamber and connecting pieces (4), which are preferably designed as a pipe section, to the required required Distance is kept and the suction valve attached in the area of the borehole deepest (6) ensures that both drinking probes under the same pressure conditions the Make a seal and pinch it when removing the long-front drinking device the blah chamber set in the deepest part of the borehole, the recovery of all long-front impregnation influences chtun qs objects guaranteed by the disconnect clutch (2) between the inflation chamber (1) and Elähkammer (2) with opposing threads enables separation so that all other parts solidify when unscrewing, but due to the opposite direction Thread of the impregnation coupling only the inflation chamber (1) is lost. Claim 2: long-front impregnating device, characterized in that it consists of a front and a rear blcth chamber, the individual Inflation chambers, as required, with pipe sections that are put together to form an Ecohrstrec} e (4) are connected and the front ßlähkarnmer at the bottom of the borehole a dynamic pressure device, preferably in the form of a ball valve (6), and this expansion chamber on opposite sides The end of the ball valve side has a separating clutch with a counter-rotating C-winch to all other screw connections within the long front impregnation device.