COAL MINES ADOPT LONGWALL METHOD

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600350029-1
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 23, 2011
• Sequence Number: 29
• Publication Date: September 27, 1950
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/09/14: CIA-RDP80-00809A000600350029-1
CLASSIFICATION CONFIDENTIAL
CENTRAL INTELLIGENCE AGENC1tiONfIDENT
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD NO.
SUBJECT Economic - Mining, coal
HOW
PUBLISHED . Daily newspapers
WHERE
PUBLISHED Tsinan; Mukden
nATF
PUBLISHED 4, 15 Jul 1950
PROHIB
3
REPRODUCTION OF THIS TORY
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DATE OF
INFORMATION 1950
DATE DIST. a1 Sep 1950
SUPPLEMENT TO
REPORT NO.
COHL MINES ADOPT LONGWALL METHOD
SHANTUNG MINES INCREASE PRODUCTION -. Tsinan Ta-chung Pao, 4 Jul 50
Tsinan -- The adoption of the new longwall mining method by authorities
at the Hsi-ho (1) numbers refer to appended character, Hung-shah (2),
Chia-wang (3), and Hein-po (it) coal mines has already proved effective and
provided valuable experience.
At'its first Coal Mining Conference in Jac:iary, the Shantung Bureau of
Mining resolved to revise mining techniques. But a general lack of enthu-
siasm and comprehension on the part of leaders among the mining cadres, en-
gineers, and members of the bureau prevented the adoption of the new method.
Chen-yu (5), Chief of the Central Ministry of Fuel Industry, made an inspec-
tion tour of Shantung in mid-March and the new system was put into effect in
the opening days of April at the above-mentioned mines.
To facilitate. control, five coal pits were chosen from among the four
mines in which to conduct the experiment. In the first period of experimen-
tation, the authorities took a relatively serious attitude toward the project.
Estimates were made by the engineers; the workmen involved in the experiment
were organized into longwall squads. Essential cadres and engineers themselves
assumed leadership and designated the assignments of the more effective skilled
workers and engineers. As s6on as the operations had begun, however, the work-
men showed fear and concern, saying they were "in no rush to dig out all the
coal in the ground." The engineers then announced the longwall estimates and
explained the good points and working methods of the new system. After study-
ing the problem, the workers gradually overcame their worry and wished to in-
stitute the project.
After 2 months, considerable results had been achieved. The five pits
had produced a total of over 12,000 tons of coal. Aside from the Hung-shan
Mine, where four w4 ken incurred slight injuries, there were no casualties.
Miners' efficiency has risen at Hung-shan and Hsi-ho, and a new record has
been set at Chia-wang. G
wang.
rou
p efficiency also has
risen at
H
si-ho an
d C
? t-
CONIHDENTIAL
CLASSIFICATION . CONFIDENTIAL
NAVY NSRS DISTRIBUTION
AIR F8I
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i FME D L
In the face of these experiences, the cadres, engineers,bskilled workers,
and miners all regarded the longwall method more highly
points remain: in some. cases, overheads have ccollapsed after only a few days;
some supports are not properly aligned; cadre
Consequently, group efficiency has fallen at Hsin-po and Hung-shan. At
the Hsi-ho Mine, the mi;iers have not been sufficiently educated in the new
longwall method and there is much concern among them. If the miners hear any
noise in the overheads, they run in confusion from their pits. dInsufficient
attention has also been given the practice of comparing no ,
provements, and the like. The system, after 2 months, still needs certain re-
controlling mininog most
the one factor
finemen
serioust consideration Undoubtedly is the
NORTHEAST MINES RAISE OUTPUT -- Mukden Tung-Pei Jih-pao, 15 Jul 50
Mukden -- The quality and quantity of coal output has improved markedly (7),
since the new longwall technique was introduced at the Hao-kang (6), 8) mine
Nor
the
the j
method hasau
Bure ofdCoalFou-Mineshsin Understhehleadersh pdof Sovietrtechnicians, the newtheast
been extensively applied at the mines. The Tung-d a re
production
shah Mine has gradually raised daily
675 tons since the application of mechanized coal mining. At the No 3 Shaft
been brought from
phas ercent).
of the Chi-hsi Ma-shah Mine, e(rrock quota of maximum the esco5 al
11 percent down to 2.25 percent
Production costs have dropped steadily. The Hao-kang Hsing-shah Mine pro-
duced over 79,200 tons of coal in May (140 percent over its quota) at a of
381,621 yuan per ton. A total saving in excess of 315,298,000 a
fected for the month, which represents a drop of 22 percent from first-quarter
production costs. The expense in terms of wages has also fallen. In April,
each ton of coal mined represented 116,320 yuan in wages. During May,
figure dropped to 82,907 Yuan.
Since the new longwall method of mechanized mining replaced the old
pillar-and-stall system, the production rate at the No 3 Shaft of the Che hsi
Fou-
Ma-shan Mine has risen from 148 percent to 84 percent while one gang
hsin Mine reports l00 percent efficiency.
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CONFIDENTIAL COMBER 11~L
Sanitized Copy Approved for Release 2011/09/14: CIA-RDP80-00809A000600350029-1