1
FIELD OF THE INVENTION
The present invention relates to a method of continuous miner of coal. More particularly, the present invention relates to a method for continuous miner from underground coal mine with instant sand stowing
BACKGROUND OF THE INVENTION
In a typical coal mine, coals are extracted from underground mine by manually digging the different layers of coal and these coals are taken out by means of coal-tub car through a mechanized system. The cavity formed under the ground due to extraction of coal if not properly filled up with sand then there is maximum possibility of subsidiary of land sliding and severe accident may occur. To overcome existing adversity in coal mine production, an attempt is made to establish a method for continuous mining of coal from underground mine and instantly stowing the void/cavity with sand.

2 OBJECTS OF THE INVENTION
It is therefore, an object of the present invention to propose a method for
it
continuous miner from underground coal mine with instant sand stowing which eliminates the disadvantages of prior art.
Another object of the present invention is to propose a method for continuous miner from underground coal mine with instant sand stowing which is faster drivange.
A still another object of the present invention is to propose a method for continuous miner from underground coal mine with instant sand stowing which increases the productivity of the mine and is better percentage of extraction as well as low cost of production.
A further object of the present invention is to propose a method for continuous miner from underground coal mine with instant sand stowing which is less risky and hazardous.

3
A still further object of the present Invention is to propose a method for continuous miner from underground coal mine with instant sand stowing which is less possibility of subsidence of land.
An yet further object of the present invention is to propose a method for continuous miner from underground coal mine with instant sand stowing which maintain strata control. (Strata is a layer of rock with internal characteristics that distinguishes it from contiguous layer. The strata may vary in their thickness and structures due to different mode of deposition. So control of the strata is to be exercised by exploiting it's physico-mechanical properties).
SUMMARY OF THE INVENTION
The method for continuous miner from underground coal comprising of the following steps.

4
First step - A layout is chalked out on the surface of the land with a demarcated boundary line beneath which the extraction of coal is to be carried out. This Ss popularly known as panel.
Second step - A planning is made out for ingress way for man and material approach, internal passage, ventilation, drainage, exit, transportation for coal outlet of the panel maintaining the norms of coal and mining rule 1957. and progress digging gradually as per sanctioned plan
Third step - On progress by gradual digging a driving gallery of size 4.8m x200m and 2.4m height is prepared besides a passage from bottom to top in a compartment space of size 100mx 200m (centre to centre)
Fourth step - Coal is taken out from bottom of the gallery and when all coals are taken out from last top step layer of the gallery in one compartment then proceeded to a next adjacent similar compartment having same size leaving a space apart which acts as a pillar to support the upper layer which is popularly known as strata control.

5
Fifth step - Further proceed by digging of similar size gallery in next adjacent second compartment of similar size from top to downward direction and started stowing sand in the first compartment simultaneously. Stowing is usually employed where the entire voids created by the extraction of coal and that is to be completely and solidly stowed. Stowing material (sand) is transported form out side the mine and filled in the extracted area under high hydranlic pressure. The object of stowing is for prevention the surface subsidence.
Sixth step - proceed further, the digging of a third similar compartment adjacent of second compartment from bottom to upward direction to form similar size gallery leaving a space apart for second pillar and simultaneously stowing sand in the second compartment.
Seventh step - Proceed the digging of such compartment wise along diagonally of the panel and simultaneous stowing sand in the previous vacant compartment.

6 BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure-1- Shows a schematic diagram of sectional view of continuous miner from underground coal mine with plurality of compartments.
Figure-2- Shows a schematic diagram of compartment galleries built up in plurality of compartments separated by a pillar between two such compartment continuous mining in one compartment and strowing the prior vacant compartment
DETAILS DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION
Figure-1- showing plan area of a panel (1,2,3,4,) having a area of 2000m x200m beneath which coals are to be extracted. For continuous miner of coals a numbers of steps are followed.

7 Step-1- Chalking out and marking the area (1,2,3,4).
Step-2- Digging start from a point (2) to downward to make ingress passage for man and material move meant and simultaneously digging also starts from point (1) to downward direction for ventilation and making a passage (1,5,6,2) and after further digging downward, a passage (5,7,8,6) is made.
Step-4- Start digging from compartment C1, and coals are taking out by making a first step of gallery (S1) having a size 4.8mx200m and next digging coal upwards to form a second step up (S2) leaving a height of
2.4m rib for every adjacent upward steps (S1, S2, S3, S S7). Making all
such steps to complete digging of compartment Q.
Step-5- After completion of compartment C1, start digging from upward to downward from the compartment C2 leaving a space for pilar P1, to form first step S1 and next below 2.4m of first step (S1) start digging coal to form
second downward step (S2) and so on (S1 S7) until it completes C2. At
the starting point of S1 of C2, compartment C1 is vacant and start strowing

3
by sand transported from outside the mine and filled in the extracted compartment C1 under hydraulic pressure for prevention of surface subsiding.
Step-6- After completion of extraction of coal from the compartment C2 and leaving a space for pillar (P2) start digging from bottom to form first step Si of compartment C3 and continued digging until step S7 at the top of compartment C3 is completed. When the digging going on in compartment C3, C2 compartment is vacant and start filling the void stowing with sand.
Step-7- After completion of digging C3, start digging from top to form step Si of compartment G» and when digging going on in compartment Gi, simultaneously,sand stowing going on in compartment C3.
Step-8- Continuous digging in one compartment and simulteuous filled up by stowing in the prior adjacent vacant compartment takes place by sand.

9
Step-9- Such processes are carried out preferably along diagonally one after another until it covers the entire panel.
Step-10- Coals are taken out from point 1 by means mechanized coal-tub transporter.

10 WE CLAIM
A process for continuous miner from underground mine with instant sand stowing comprising foliowing steps:
- making a layout and demarcation by the boundary line of panel area
(1,2,3,4) below which the coal to be mined and extracted;
- selecting a starting point (2) and arranging an approach path for the
resources to be taken inside including informal passage for man,
ventilation, drainage, exit, coal outlet, and sub dividing the total panel
(1, 2, 3, 4) a plurality of compartments (C1 C2 C3 C4) with the
supporting pillars therein (P1 P2 P3 P4);
- digging from point 2 area and continuing the digging according to
planned layout;

11
- commencing the digging from bottom of a first compartment (C|) and
moving upward following by digging from the top of a second
compartment (C2) to downward direction;
- sand stowing of the first compartment (Ci) simultaneously with the
digging of the second compartment (C2);
- continuing the digging and sand stowing diagonally along the panel
area (1, 2, 3,4)

2. The process as claimed in claim 1, wherein a plurality of compartments
(Ci, C2, C3/ Q.....) having size of 200m x 100m are formed by digging,
leaving a space apart for pillars (Pi, P2, P3, P4).
3. The process as claimed in claim 1, wherein a plurality of steps (Si, S2
S?) in the form of gallery are formed by digging coal in all the
compartments (d, C2, C3 ).

12
4. The process as claimed in claim 1, wherein each step of gallery having a
size 4.8m x 200m leaving a height of 2.4m constituting rib for the next
upper/lower step.
5. The process as claimed in claim 1, wherein each compartment is located
just besides the passage (7,8) (5,6).
6. The process as claimed in claim lf wherein the extracted coals are taken
out from a passage (7, 5,1) by means of a mechanical transporting device.
7. A process for continuous miner from underground mine with instant sand
stowing as substantially described as illustrated herein with reference to
accompanying drawings.
The method for continuous miner from underground coaf comprising of the following steps.