IMPROVED MINING METHODS DECREASE KUZBASS COAL LOSSES - HORIZONTAL-LAYER METHOD COMBINED WITH BACKFILLING

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600390138-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: October 18, 2011
• Sequence Number: 138
• Publication Date: April 26, 1951
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/10/19 :CIA-RDP80-00809A000600390138-6
CLASSIFICATION CONFIDEIIPYIALCOi~~rI~7tNTf~~
CENTRAL INTELLIGENCE AGENCY REPORT
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD NO.
COUNTRY USSR
SU BJECT Economic -Coal, mining, machinery
7X13 DOCU PINT CONTAINS INIORYATION AP/[CTIN/ iN[ NA710NAL Ol P[X3l
Of TX! UNITlO STAT[3 WITNIN TN! Y[ANINO OS 13P10NA01 ACT SD
V. S. C.. ]I AMC ]]. A3 AY[NO[0. ITS TRANSMISSION OR TNl R[VSLATION
NI lIT3D0 STTLAN' I RSPROOUCTION OS TNIf IORYN~31 PROHISpiIO, I! IRO?
DATE OF
INFORMATION 1951
DATE DIST. 016 Apr 1951
N0. OF PAGES 4
SUPPLEMENT TO
REPORT N0.
THIS IS UNEVALUATED INFORMATION
IMPROVED MIflIHG ME`T'HODS DECitFAASE ~UZBASS COAL IASSES
HOk.LZOATAL-LAYER METHOD GUMBINED WITH BACKFILLING
I. I. Bslelos,
~- Ir. ;:r:: :' ??ti' 1951
~~~'- ~
Coal losses during actual mining operations were reduced from 31 percent
in 1948 to 19 percent in the third quarter of 1950 in mines oY the Kuzbassugol'
Combine. Cosl louses iu the proknp'yevek-Kiselestsk': area, where, Yor the most
part, thick, steeply dipping seams are mined,wez'e.:luced from 34.3 Percent to
21.2 percent. These results were achieved by z~egulating existing systems of
mining :pith caving of the side rock and by introducing systems oY mining with
backPilling of the worked-out area.
An analysis shows that coal losses decreased as follows in 1950, as com-
pared with 1948, when steeply dipping seams were worked by a mfertom 31i5cpe~rcent
caving of the side rock: using the shield method oY minergent to 18.3 percent;
to 26 percent; using the long-pillar method eft to.21.8 percent; using they
using the eloping-layer method, fromercentpto 16.8 percent.
horizontal-layer method, from 32.5 P
ftine~ty mine faces in ~tltes mines are fulfilling the task of b'ackfilling
tt:51edc1assiP es these490 minecPaceseaccordingito theltypemoP mining lemployed
and the method of bazkfilling used as of 1 December 19500
Mining SYstem
Automatic
H
Backfilling
sulic Pneumatic Machine Total
Percent
Long Pillars along
_ 20
22
strike of seam
18
_
2
Sloping layer
22
7 - - 29
32
Sanitized Copy Approved for Release 2011/10/19 :CIA-RDP80-00809A000600390138-6
 Sanitized Copy Approved for Release 2011/10/19: CIA-RDP80-00809A000600390138-6
' 1
Minin6 SYatem
Horizontal layer
Strips along
rise of seam
Transverse sloping
layer -
Shields ~
Total .'...`"~"~!5? ..._13 ..
Percent 50 14
4 5
11
12 24 l00 -
From the above data it is clear that the moat widespread methods of working
thick, et22ply dipping aFama with backfilling of the worked-out area are the
horizontal-layer and the sloping-layer methods which account Yor 59 mine fai:cs,
or 65 percent of the 90 mine"faces under discussion. However, the co~ribution
of these two methods to the coal output.differa': Although, taken together,'they
account::%or,62' pefodilt:.~ot~.tlt2::,coe1~~?octput, where-backt'illing~o~ the worked out'
areas is'employed.'~~~8l1eChOritoYrCA1'la3rer method accounts for only 18 percent, while
the sloping-layer method accounts for 44 pxcent.
The, following table giv@'s data f~,r the third quss?ter of 1950 on t,:~:e pro-
ductivity~ofrmiae faces using different methods of mining end backfilling cf the
worked-oui,+i'efi:
Mining System
Hackfilling Method
Monthly Productivity
of Mine Face (tons)
i
Long pi._lar
Automatic
2,1+4
Same
hydraulic
2,205
Sloping layer
Automatic
1,827
Same
Hydraulic
1,920
Horizontal layer
Backfilling machine
739
Same
Hydraulic
1,188
Same
Transverse sloping
layer
Same
Pneumatic
Hydraulic
Backfilling machine
b84
1,559
1,349
Shield
Automatic
5,753
The Iihznetsk Scientific Research Coal Institute worked out four different
schemes to improve the coal output, using the horizontal-layer method. The kfi11-
firat.provided for t~q,utle,.o$ the ;}~~.~Sntale~aY~:?~hod wi,'~11r,;y?~.i~F~i~