SU1504349A1 - Method of supporting underground working - Google Patents

Abstract

The invention relates to the fastening of chamber underground workings in rock formations and reduces the costs of fastening. From the earth surface 1 or from the previously completed production 2 towards the future production (BV) 3, the drill hole is first the leader well (BF) 4. It is placed adjacent to the BV 3 contour or from the side of the roof rocks. From LS 4, a series of parallel wells (PS) 5 is drilled at an angle to it for anchors before intersecting them with contour BW 3. After the end of drilling, anchors are installed in PS 5 to strengthen the surrounding rocks. The elements of the anchors are entered into PS 5 through the LAN 4. Drilling equipment is used to perform this work. 2 Il.

Description

one

(21) 4283864 / 22-03

(22) 06/10/87

(46) 08/30/89. Bul 32

(71) Severomorsk Specialized Administration of the All-Union Production Construction and Assembly Association Soyuzgidrospetsstroy and the Mining Institute of the Kola Branch

USSR Academy of Sciences. CM. Kirov

(72) V.P., Konukhin, V.N. Komlev and N.V., Yakubovsky

(53) 622.281.74 (088.8)

(54) METHOD FOR STRETCHING THE UNDERBORNE DEVELOPMENT

(57) The invention relates to the fastening of chamber underground workings in

one

rock formations and reduces fastener costs. From the earth surface 1 or from the previously completed production 2 towards the future production (BV) 3, the drill is firstly the leader well (B) 4, It is placed near the contour of BV 3 or from the side of the roof rocks. From the LS 4, a series of parallel wells (PS) 5 is drilled at an angle to it for anchors before crossing them with the BV 3 contour. After the end of drilling, anchors are installed in the PS 5 to strengthen the surrounding rocks. The elements of the anchors are entered into PS 5 through the LAN 4. Drilling equipment is used to perform this work. 2 Il.

g

 / /////////////

SP

with

Ij

ut.

3150

The invention relates to a technique for fixing chamber underground workings in rock formations, and specifically to methods for anchoring them, and can be used in the construction of underground power plants, factories, warehouses and other structures of large cross-section.

The purpose of the invention is to reduce the cost of mounting,

Fig. 1 is a diagram of the attachment of underground workings from the earth's surface or from previously completed production by drilling the leader well to the contour of the future development; FIG. 2 is a schematic of the attachment from the side of the roof rocks of future production.

The method is carried out as follows.

From the ground surface 1 or from the previously completed production 2 towards the future production 3 the drill, first the leader well 4, Drilling from the surface at depths of laying the excavation not less than 50 m is carried out, for example, by drilling equipment used in geological exploration Minerals (SKB-4 or ZIF-650 type machines). The diameter of the lead hole is at least 76 mm. It is placed p up to the contour of the future well (fig, 1) or from the side of the roof rocks (fig, 2),

one

/// ////////// Ji ////// // ///

Editor A. Ogar

Compiled by B.Usan-Podgornov

Tehred M. Khodanich Proofreader I. Muska

Order 5226/33

Circulation 449

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

From the leader well 4, using well-known directional drilling, we drill, for example, using Tion deflectors with an angle thereto a series of parallel wells 5 for the anchors before intersecting them with the future production loop 3. After the completion of the drilling, anchors are installed in the wells 5. When installing anchors, depending on the type of support selected, lugs are introduced into wells 5 through the leader well 4 or anchor cable or rod reinforcement and bonding solution, as well as other necessary operations,

Drilling equipment (drilling rig, drill pipe string, etc.) is used to perform these works.

Claims (1)

Invention Formula I A method of securing an underground mine, including drilling from a previously completed mine towards a future series of wells and installing anchors in them to strengthen the surrounding rocks, characterized in that, in order to reduce the costs of the fastening, the leader well is drilled from the previously completed production; a series of wells is drilled from it at an angle parallel to one another to intersect them with the contour of the future development. Subscription