CN211448655U

CN211448655U - Two aquifer developments observation device

Info

Publication number: CN211448655U
Application number: CN201922172626.1U
Authority: CN
Inventors: 张鹏; 闫勇; 李彪
Original assignee: Shandong Tangkou Coal Industry Co Ltd
Current assignee: Shandong Tangkou Coal Industry Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-09-08
Anticipated expiration: 2029-12-06

Abstract

A dynamic observation device for two aquifers comprises a fixed sleeve, an inner layer sleeve, an outer layer sleeve, an orifice detection branch pipe and a grouting expansion pipe. The fixed sleeve is arranged in the drill hole, an outer sleeve is arranged inside the fixed sleeve, and an inner sleeve is arranged inside the outer sleeve. The top ends of the outer sleeve and the inner sleeve are provided with flange plates, a cavity is arranged between the outer sleeve and the inner sleeve, an orifice monitoring branch pipe communicated with the cavity is arranged at an orifice of the drill hole on the outer sleeve, and a spiral sound guide support iron plate is arranged in the cavity. An annular supporting iron block is sleeved on the periphery of the bottom end pipe orifice of the outer-layer sleeve and the periphery of the inner-layer sleeve. At the aquifer section, a plurality of through holes are formed in the outer casing pipe, and the outer casing pipe at the through holes is wound with the grouting expansion bag pipe. A two aquifer developments observation device, its reasonable in design, convenient to use can better solve the fixed problem of inlayer sleeve pipe, realizes two aquifer hydrology condition isolation drill way monitoring.

Description

Two aquifer developments observation device

Technical Field

The utility model relates to a drilling hydrogeological exploration equipment in the pit especially relates to a two aquifer developments observation devices.

Background

According to the requirements of the coal mine water control regulations, the coal mine needs to dynamically observe main aquifers, but is influenced by roadway engineering, the arrangement of drilling holes is limited, and the simultaneous observation of a plurality of aquifers in the same area is difficult to realize, particularly the observation of a plurality of high-bearing aquifers. In addition, a certain range of protective coal pillars are reserved for each observation drill hole, so that the recovery amount of coal resources is increased by reducing the construction of the drill holes. In the prior art, the one-hole multi-monitoring technology is mainly used for monitoring gas and stratum, and is generally adopted in hydrological hole monitoring: one is that the monitoring probe is put down to each aquifer position through a drilling hole to carry out in-hole monitoring; one is to monitor the water in the aquifer at the port by burying a multi-layer sleeve to raise the aquifer water to the port location. The two types of monitoring described above have the following disadvantages: 1. the first monitoring mode is 'one-off' monitoring, the maintenance difficulty is high, once the monitoring probe is damaged due to external force influences such as ground pressure and the like, the monitoring probe cannot be replaced, drilling needs to be conducted again, the cost is greatly increased, and the risk of water guiding is increased. 2. The second kind is through the multilayer sleeve pipe mode, has the biggest problem to be the fixed problem in next floor aquifer sleeve pipe upper portion, especially when monitoring high confined aquifer, will have great potential safety hazard. The construction process requirement for grouting and pipe fixing of the multilayer sleeve is high, and the construction difficulty is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point among the prior art, provide a two aquifer developments observation device, its reasonable in design, convenient to use can better solve the fixed problem of inlayer sleeve pipe, realizes two aquifer hydrology circumstances isolation drill way monitoring.

A two aquifer developments observation device, detect branch pipe and slip casting expansion pipe including adapter sleeve, inlayer sleeve pipe, outer sleeve pipe, drill way. The fixed sleeve is arranged in the drill hole, an outer sleeve is arranged inside the fixed sleeve, and the outer sleeve extends to the bottom plate of the upper observation aquifer. The inside of outer sheathed tube be provided with the inlayer sleeve pipe, the inlayer sleeve pipe extends to the roof department of lower floor observation aquifer. The top ends of the outer sleeve and the inner sleeve are also provided with a flange plate at the position of an orifice of a drill hole, a cavity is arranged between the outer sleeve and the inner sleeve, the orifice of the drill hole is provided with an orifice monitoring branch pipe communicated with the cavity, and a spiral sound guide support iron plate is arranged in the cavity. The bottom end pipe orifice of the outer layer sleeve is also sleeved with an annular supporting iron block on the periphery of the inner layer sleeve. At the aquifer section, a plurality of through holes are formed in the outer casing pipe, and the outer casing pipe at the through holes is wound with the grouting expansion bag pipe.

Furthermore, the outer diameter of the annular supporting iron plate is the same as that of the outer-layer sleeve, and the section of the annular supporting iron plate is trapezoidal.

Further, the grouting expansion bag pipe is wound for one to two circles.

The utility model has the advantages that: 1. after the welding of two-layer inside and outside sheathed tube is consolidated, can regard as a whole, whole device is more firm reliable, can realize the drill way separation observation to two aquifers. 2. The construction process of observing the drilling can be reduced, the fixing problem existing in multilayer sleeve observation can be avoided better, and the potential safety hazard problem existing is reduced to the greatest extent.

Drawings

Fig. 1 is a schematic structural diagram of a two-aquifer dynamic observation device of the utility model.

The method comprises the following steps of 1, a fixed sleeve 2, an outer sleeve 3, an inner sleeve 4, a cavity 5, an orifice monitoring branch pipe 6, a flange plate 7, a spiral sound guide supporting iron plate 8, a grouting expansion bag pipe 9, an annular supporting iron block 10 and a through hole.

Detailed Description

Referring now to the drawings in the specification, in conjunction with specific embodiments, there is illustrated the following: a two aquifer developments observation device, including adapter sleeve 1, inlayer sleeve pipe 3, outer sleeve pipe 2, drill way detection branch pipe 5 and slip casting expansion pipe. And (3) carrying out the drilling construction work of the observation section according to the drilling design, and fixing the sleeve 1 at the lower orifice. And after the sleeve 1 is fixed at the orifice below the drill hole, grouting and fixing are carried out, and then the drill hole is continuously constructed until the lower part is observed at the top plate of the aquifer. The fixed sleeve 1 is internally provided with an outer sleeve 2, and the outer sleeve 2 extends to the bottom plate of the upper observation aquifer. The inner casing 3 is arranged in the outer casing 2, and the inner casing 3 extends to the top plate of the lower observation aquifer. And welding the inner layer of sleeve pipe and the outer layer of sleeve pipe of each section, and performing a bleeding sealing test to ensure that the welding position cannot leak water or seep water. The top ends of the outer casing 2 and the inner casing 3 are also provided with a flange 6 at the position of an orifice of a drill hole, a cavity 4 is arranged between the outer casing 2 and the inner casing 3, the orifice of the drill hole is provided with an orifice monitoring branch pipe 5 communicated with the cavity 4 on the outer casing 2, the orifice monitoring branch pipe 5 is used for installing a monitoring probe, and the tail end of the orifice monitoring branch pipe is indirectly sealed with the inner casing 3. A spiral sound guide supporting iron plate 7 is arranged in the cavity 4. The bottom end pipe orifice of the outer layer sleeve 2 is also sleeved with an annular supporting iron block 9 at the periphery of the inner layer sleeve 3. At the aquifer section, a plurality of through holes 10 are formed in the outer casing 2, and the grouting expansion bag pipe 8 is wound on the outer casing 2 at the through holes 10. And determining that the thickness of the processed through hole section is the same as that of the aquifer according to the thickness and the water outlet condition of the observed aquifer at the exposed upper part of the drill hole. The through holes are used for water in the aquifer to enter the outer layer sleeve, namely the cavity.

Further, the outer diameter of the annular supporting iron block 9 is the same as that of the outer casing 2, and the section of the annular supporting iron block 9 is trapezoidal.

Further, the grouting expansion bag pipe 8 is wound by one to two turns.

The utility model discloses when concrete construction, need carry out intraductal slip casting earlier to design pressure, carry out outside of tubes slip casting again, during the period notice 5 play water circumstances of drill way monitoring branch pipe constantly, slip casting inflation bag pipe 8 leaks the thick liquid and blocks up the upper portion aquifer when preventing the slip casting, the influence is surveyed. And then, sweeping the hole in the device, and carrying out clear water pressure test, wherein the pressure must meet the design requirement, otherwise, grouting and reinforcing in the hole are carried out again. And after the pressure test is successful, drilling construction is continued to be carried out to the lower part for observing the aquifer according to the design. And finally, after the drilling construction is finished, mounting monitoring probes on the orifice monitoring branch pipe 5 and the flange 6 for observation to realize one-hole two-observation.

A two aquifer developments observation device, its reasonable in design, convenient to use can better solve the fixed problem of inlayer sleeve pipe, realizes two aquifer hydrology condition isolation drill way monitoring.

Claims

1. The utility model provides a two aquifer developments observation device, is including fixed sleeve pipe (1), inlayer sleeve pipe (3), outer sleeve pipe (2), drill way monitoring branch pipe (5) and slip casting expansion pipe, its characterized in that: the fixed sleeve (1) is arranged in the drill hole, an outer sleeve (2) is arranged inside the fixed sleeve (1), and the outer sleeve (2) extends to a bottom plate of an upper observation aquifer; an inner sleeve (3) is arranged inside the outer sleeve (2), and the inner sleeve (3) extends to a top plate of a lower observation aquifer; a flange plate (6) is arranged at the top end of the outer sleeve (2) and the inner sleeve (3) and at the position of an orifice of a drilled hole, a cavity (4) is arranged between the outer sleeve (2) and the inner sleeve (3), an orifice monitoring branch pipe (5) communicated with the cavity (4) is arranged at the orifice of the drilled hole on the outer sleeve (2), and a spiral sound guide support iron plate (7) is arranged in the cavity (4); an annular supporting iron block (9) is sleeved at the pipe orifice at the bottom end of the outer-layer sleeve (2) and also at the periphery of the inner-layer sleeve (3); at the aquifer section, a plurality of through holes (10) are arranged on the outer casing (2), and the grouting expansion bag tube (8) is wound on the outer casing (2) at the through holes (10).

2. The two-aquifer dynamic observation device according to claim 1, wherein: the outer diameter of the annular supporting iron block (9) is the same as that of the outer-layer sleeve (2), and the section of the annular supporting iron block (9) is trapezoidal.

3. The two-aquifer dynamic observation device according to claim 1, wherein: the grouting expansion bag pipe (8) is wound for one to two circles.